Door-lock



C. M. ANDERSON.

DOOR LOCK.

APPLICATION min ocT. 21'. 1911.

Patented Mar. 2', 1920.

02U@ di@ AT TOR/Vf.- YS.

CARL 1V[. ANDERSON, 0F HAVANA, NORTH DAKOTA.

DOOR-LOCK.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed October 27, 1917. Serial No. 198,813.

To all whom t may concern:

Be it known that I, CARL M. ANDERSON, a citizen of the United States,resident of Havana, county of Sargent, State of North Dakota, haveinvented certain new and useful Improvements in Door-Locks, of whichOther objects of the invention will appear from the following detaileddescription.

The invention consists generally in various constructions andcombinations, all as hereinafter described and particularly pointed outin the claim.

In the accompanying drawings forming part of this specification,

Figure 1 is an outside view of a portion of a building, illustrating asliding door with my invention applied thereto,

Fig. 2 is a detail sectional view, showing the device in its lockingposition,

Fig. 3 is a similar view, showing the lock in its released position,

Fig. 4: is a transverse sectional view through the door casing and aportion of the door, with the lock in its closed position,

Fig. 5 is a detail sectional view of a modied construction.

In the drawing, 2 represents the wall of a building having a dooropening and a sliding door 3 supported on a suitable track 4. 6 and 7represent the door posts on opposite sides of the opening. Brackets 8are mounted.

on the post 7 in the path of the door to form stops therefor and also tohold the edge of the door against the post 6. The post 7 is providedwith a recess 9 therein having a plate 10 secured to the post over therecesses and provided with a slot 11. A latch 12 is mounted at 13 on thedoor and has a hooked end 1 1 to enter the slot 11 and lock the doorsecurely against opening. A lever 15 is pivoted at 16 on the-door andhas a toggle extension 17 at its pivoted end to which one end of a link18 is pivoted. The other end of said link is pivoted to the middleportion of the latch 12. When the lever 15 is raised to its lockingposition, its pivotal connection with the link 18 will be moved past thecenter of the pivot 16 and the latch 12 will thereby be locked and whenthe lever is swung to the position shown in Fig. 3, its pivotalconnection with the link 18 will be moved to the other side of the pivot16 and the latch 12 will thereby be raised and disengaged from the plate10 and withdrawn from the slot 11.

.In Fig. 5 I have shown a modified construction, which consists in'providing two latches, as in my patent above referred to, pivotallyconnecting them by a bar 19, the

I ,link 18 being pivotally connected at 20 t0 the middle portion of thisbar instead of to one of the latches, as in the previously describedconstruction, and I mount the bar 19 between the hooks and the pivots ofthe latches instead of on the outer ends of the latches. The device istherefore more compact, less metal is required in its manufacture, andit is therefore less expensive to put on the market.

I claim as my invention:

The combination, with a door post having a recess therein and a slottedplate fitting over said recess, of a door, a latch pivoted at one endnear the inner face of the door and extending transversely thereof andhaving a hooked end to enter the slot in said plate and engage the edgeof the slot, a4 lever pivoted near one end adjacent the inner face ofthe door and having a comparatively short offset extension on one sideof its pivot, said lever being adapted to swing toward and from theadjacent face of the door, and a link pivotally connected with saidlever extension and at one end with said latch at a point intermediateto its pivot and its hooked end, movement of said lever swinging thepivot of connection of said link thereon past the pivot of the lever tomove said latch to its locking or releasing position, and lock it insuch position.

In witness whereof I have hereunto set my hand this 18th day of Oct.1917.

CARL M. ANDERSON.

Witnesses:

H. J. PFEIFFER, C. E. CASTLE. z QTA

